Fused-quartz transilluminator



35o-@ml l. NA

c. H. KEW v FUSED QUARTZ 'TRANSILLUMINATOR Filed April 5. 1926 attoznu;

Patented lidar. i3,

.n s una .ist alla .il use: M

a ya. i. alla i1. a

CHARLES H. EER-R, OF SGUTHBBDGE, MASSACHUSETTS; ASSGNOR TO AMERICAN OP- TICAL CGMANY, OF SOUTHBBIDGE, lASSCHUSETTS, A VOLUNTARY ASSOCML- TON OF MASSACHUSETTS.

FUSED-Q UARTZ TRNSILLUMINATR.

.Application filed April 5, 1926.v Serial No. 99,817.

rlhis invent-ion relates to diagnostic illuminating ii'istruments and has particular reference to an improvedl fused quartz transilluminator designed primarily for illuminating the human eye.

'lhe principal object. of this invention is to provide a quartzilluminator and means 'tor illuminating the same, the quartz illuminator being made in such shape that it can be approached closely tothe eye without interference from the restol' the instrument.

.inother object ofthe invention is to provide heat absorbing means between the quartz transilluminator and the illuminating means to prevent the quartz transilluminator from becoming hot.

Another object of the invention is to provide an olliset illuminating means in one piece of material which will have the high properties ot transmitting light from the source of light.

Other objects and advantages ol the invention will become apparent; from the following description taken in connection with the accompanying drawings, and it will be apparent that I may malte any modifications in the specific details of construction and arrangement oitl parts without departing from the spirit of the invention as expressed in the accompanying claims, the preferred form only of the invention being shown by way of illustration. l, therefore, do not wish to be limited to the exact details ot' construction and arrangement ol parts shown.

Referring to the drawings, in which similar characters of reference are employed to denote corresponding parts throughout:

Figure l is a. partial eleva-tion of the transilluminator partially shown in section;

Figure 2 is a. top plan View of Figure l;

Figure 3 shows a fused quartz lens having yan offset end of Ll5 degrees;

Figure l shows a fragmentary portion oi a. straight quartz lens;

Figure 5 shows a fragmentary portion of a. bent quartz lens, the bent portion being bent at an acute angle to the center line ot the stra-ight portion. ln the examination ot' the human eye it becomes at times important to examine it under a high and concentrated illumination, and it is desirable that this illumination be brought as close to thc surface ofi the eye as possible withoutinjury to the eye. ln my inyention l talregadyantage of that property of; fused qua tz of transmitting light tliiiigliwa"lens'inade ot that substance when al portion has been offset or bent. The use oit such a. lens possesses many advantages. It is cool and it does not require other ine-- chanical fittings andv bulky parts which would come in contact with the pationts face. lt allows an eilicient means of bringing the light close to the patients eye and yet a light that can be so concentrated as to give the volume ot intensity necessary.

Referring to the drawings, l providewaI.

athf, iniligure l, or as in iligures 8 and or may be straight, as shown in Figure 4;. I finish the outer end 3 with a curved lens surface and at the lower end el: l mount the crystal in a metallic cap 5, securing it therein by cementitious means or otherwise. The cap 5 has the screw threaded annular portion 6 and the light chamber 7. lt desired, I mount a lens or piece ot heat absorbing glass 8 at the top of the chamber 7 below the .end 4 of the quartz lens l. rl`his heat absorbing lens may be made oit any well known prior art heat absorbing glass n o particularly those containing ferrous iron.

port 9 issecured the handle of the ordinary diagnostic instrument containing a source of electric energy. such as a battery or ar plug connection lor an outside source ot electric energy, and light connecting means from the lamp to the source oi energy. deans are also provided on the handle portion for turiiling on or ofi the current to illuminate the lamp. rlhe rays of light from the lamp l0` are transmitted through Jthe heat absorbing lens 8 and the fused quartz lens l to the eye of the patient.

The cap 5 being removable on the screw threaded annulus 6, permits the de tice to be interchangeably used with other types of diagnostic instruments; hence this transilluminator may become a part ot an ordinary standard diagnostic set such as is used by oeulists. By removing the cap 5 also lens lY ot' fused qrrartg.` which n ay be bentvas 

